The objectives of the field operations conducted from 10 to 18 July 1994, over a 

 5.68 km^ area of CLIS, were to 



• delineate the dredged material footprints of, and examine any topographic 

 changes to, the NHAV 93 and MQR mounds; 



• demonstrate the capabilities of acoustic remote sensors in collecting surface and 

 subbottom sediment characterization data; 



• assess the benthic recolonization rate of the NHAV 93 and MQR mounds and 

 monitor the successional status of the portions of the MQR mound unaffected by 

 cap supplementation operations; and 



• collect sediment samples at NHAV 93. MQR, and three reference areas for 

 grain size, TOC, metals, and PAH analysis. 



The July 1994 field effort at CLIS tested the following predictions: 



1. With the exception of some compaction of basement material, there will be 

 little to no change in topography of the NHAV 93 mound, while the MQR 

 mound will display a moderate increase in mound height. 



2. Benthic recolonization at the NHAV 93 mound will be mostly Stage I with 

 progression into Stage II in some areas. The successional stams of the MQR 

 mound will be mostly Stage I and II in close proximity to the center and 

 progressing to Stage III in locations not affected by the 1993/94 disposal 

 activities. 



3. Capping material will have covered the majority of the dredged material at 

 the NHAV 93 project area. However, more capping material may be 

 required north and west of the NHAV 93 buoy location. 



Monitoring Cruise at the Central Long Island Sound Disposal Site, July 1994 



